Fluid brake



' April 13 1926.

FLUID BRAKE Filed Nov. 17, 1924 gwventoz C. 22; Par/r6 Patented Apr. 13; 1926.

UNITED STATES PATENT orrlca;

CHARLES R. PARKER, E KANKAKEE,

FLUID BRAKE.

Y '0 all whom it may concern:

Be it known that I, CHARLES R. PARKER,

a citizen of the United States, residing at Kankakee, inthe county of Kankakee and State of Illinois, haveinvented certain new and useful Improvements in Fluid Brakes,

- of which the following is a specification.

' This invention relates to an improved fluid brake which is specially, but not necessarily adapted for use upon automobiles and analogous vehicles. v

.he principal object is to provide a comparatively simple construction of the above class embodying a gear casing, and a valved fluid passage, which isconnected with the casing, and through which the fiuld 1s circulated to permit free operation of the gearing whenthe valve is open, or to lock the gearing when the valve is closed.

It is a feature to provlde a gear casing,-

which is composed of sections, in which a gearing may be housed, the sections being constructed to permit them to be fastened upon an automobile axle between the differential structure and one of the driving wheels.

Other features and advantages of the invention will become apparent from the following description and drawing.

"In the accompanying drawing, forming a part of this specification, and in which like numerals are employed to designate like I v 4 parts throu bout the same:

- Figure -1 is an elevational view of a driven shaft, with a rotor or the like,'attached to one end, showing a portion of the improved Y pump or fluid brake in associatlon' therei with.

, that the reference character 1 designates a artly, in section, and

Figure 2 is a view,"

a brake" constructed partly in elevation,

in' accordance with the present invention.

Figure 3 is an enlarged detail sectional the improved brake. 1

Figure 4 is 'a detail view, showing the Referring to the drawing, and more parto Figure 1, it may be assumed rotary driven-shaft, on one end of which is fixed a rotary. element 2. In practice, it may be the rear driven axle of an automobile and the drive wheel mounted on the outer end thereof.- 'As seen in Figure 2, a gear .3 is fixed to this shaft, and this gear is in mesh with an idler gear 4,'journaled for Application filed November 17, 1924. Serial No. 750.291,

rotation within a gear casing 5. The casing in use would preferably be disposed between the differential and one of the drive wheels. This casing, with the gearing therein may be referred to as a gear pump. One section of the casing is constructed to provide fluid passage necks 6, and to these necks a pair of duplicate tubular branches 7 and 8 are connected. It will be observed that the branches and their points of connection with the neck 6 are comparatively small in diameter and substantially increase in diameter toward their opposite ends. At the last named ends they are spaced apart, and a coupling or connection 9 1s interposed therebetween and connected therewith. The coupling is of special construction, and is constructed, as seen in Figure 3 to provide a housing for a sliding valve 10, that is, the coupling is provided with an extension 11, carrying a stuffing box 12, and is provided opposite the extension with a cupshaped portion 13 to accommodate the adjacent end of the valve. It will be apparent from Figure 4 that the last named end of the valve is provided with a V-shaped notch 14. The opposite endiof the valve is provided with a hole 15, to which a suitable manually p ated eati' lflme m b .K connected] If desired, the-'valve'-may be equipped with a packing ring 16 to provide a fluid tight joint between itself and the in Figure 4. Referring to this figure, it

will be seen that the opposite ends of the passages are reduced in width, and it is obvious that in this arrangement, and with the V-shaped notch 14 in the valve, the control of the fluid through the branches may be regulated, l

Assuming now that the shaft 1 is one seetion of the rear axle of an automobile, and

that the element 2 is the drive wheel fixed thereto, and that the casing 5 is fixed to the axle housing or the like, the operation of the device is as follows: -With the casing and tubular ducts filled vwith fluid, say for instance, oil, it is clear that when the slide valve 10 is entirely closed, fluid will be pre-" vented from circulating through the ducts. I

Under such conditions the oppositely rotating gears 3 and 4 will be locked against rotation, and a braking action will be had i i uponl the axle. However, when the valve l0is o1pened,'fluid is permitted to circulate throug obtain a cleariunderstanding of the same.- For thisreason, a more lengthy description- ,1s thought 1 unnecessary.

From theforeg'oing descriptiom: would I appear that the improved brake structure is restricted for disposition between an automobile diflerential, and a rear driving wheel.

I wish it to be understood that the invention is not, ;-in any sense, to be liinited to this particular use. For instance, it will serve quite 5 well as a transmission brake, in which case it will be installed upon the transmission shaft between the transmission mechanism 7 and the reverse universal joint. In fact, the

invention is usablej'to advantage, to .lock' any kind of rotary shaftor its equivalent.

against rotation. V I claim:

of oppositely disposed fluid conductin branches connected with saidcasing, sai

branches tapering so as to be smaller adjacent the casing, a coupling connecting'the opposite ends of the branches together, and a slide valve carried bysaid coupling and adapted for simultaneously controlling the passage of fluid through said branches.

1 2. fluid brake comprisinga gear casing, a shaft extending through said casing and having a gear fixed thereto, an idler gearjournaled for rotation to said casing and in" I mesh with the first-named gea.r,'a pair. of oppositely disposed fluid conducting branches connected with said casing, said branches tapering so as to be smaller adjacent the casing, a coupling connecting the opposite ends of the branches together, and a slide valve carried by said coupling and adapted for simultaneously controlling the passage of fluid throughsaid branches, said coupling provided with openin S12E01 receiv- I ing the ends of the branchesw ich are pro-' '55 slide valve provided with a- V-shaped v Y notched end the apex of which may be p 1 A fluid brake'comprising'a gearcas' ing,t a shaft extending through said casing and having a gear fixed thereto, "an idler- 1 gear journaled for rotation to'said casing a in mesh with the first-named gear, a pairvided with ends tapering to perch and said brought into contact with the ends of the openings.

points of the In testimony whereof I aiiixmy'signature; 5

CHARLES nrn nnn. 

